On the Hunt: Searching for Poorly Defined Camouflaged Targets.
On the Hunt: Searching for Poorly Defined Camouflaged Targets.
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DOI：
10.1371/journal.pone.0152502
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Neider MB
中科院分区：
文献类型：
--
作者：
Hess AS;Wismer AJ;Bohil CJ;Neider MB
由于嵌入式目标与它们所嵌入的环境共享视觉特征，搜索者很少能够获得此类目标的完美视觉模板。相反，它们必须依赖于不太具体的表示来指导搜索。虽然搜索已标记和未指定的目标都受到关注的文献，迄今为止，他们还没有在一个组合的情况下进行了探索。在这里，我们介绍了一个新的范例，在搜索过程中的行为表征在自然场景中的隐藏目标，同时也探讨了目标模板的保真度如何影响搜索过程。搜索场景是从森林图像中创建的，目标是该图像在随机位置的变形（大小不同）。在实验1中，提供了目标的预览;在实验2中，没有预览。几乎所有的措施实验之间没有发现差异。一般来说，反应时间和准确性随着对任务的熟悉程度而提高（对于小目标更是如此）。眼球运动的分析表明，性能优势与搜索和目标验证时间的改善有关。结合起来，我们的数据表明，即使目标定义不清，搜索隐藏的目标也可以在短时间内得到改善。
As camouflaged targets share visual characteristics with the environment within which they are embedded, searchers rarely have access to a perfect visual template of such targets. Instead, they must rely on less specific representations to guide search. Although search for camouflaged and non-specified targets have both received attention in the literature, to date they have not been explored in a combined context. Here we introduce a new paradigm for characterizing behavior during search for camouflaged targets in natural scenes, while also exploring how the fidelity of the target template affects search processes. Search scenes were created from forest images, with targets a distortion (varied size) of that image at a random location. In Experiment 1 a preview of the target was provided; in Experiment 2 there was no preview. No differences were found between experiments on nearly all measures. Generally, reaction times and accuracy improved with familiarity on the task (more so for small targets). Analysis of eye movements indicated that performance benefits were related to improvements in both Search and Target Verification time. Combined, our data suggest that search for camouflaged targets can be improved over a short time-scale, even when targets are poorly defined.